@article{TMF_2010_164_3_a4,
     author = {A. G. Sergeev},
     title = {Harmonic spheres conjecture},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {368--379},
     year = {2010},
     volume = {164},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2010_164_3_a4/}
}